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package otelroundtripper |
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import ( |
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"context" |
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"errors" |
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"go.opentelemetry.io/otel/metric/noop" |
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"io" |
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"net" |
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"net/http" |
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"net/http/httptest" |
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"strings" |
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"testing" |
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"time" |
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semconv "go.opentelemetry.io/otel/semconv/v1.18.0" |
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"github.com/stretchr/testify/assert" |
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"go.opentelemetry.io/otel/attribute" |
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) |
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func TestNew(t *testing.T) { |
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t.Run("with no options", func(t *testing.T) { |
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t.Parallel() |
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roundTripper := New() |
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assert.NotNil(t, roundTripper) |
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}) |
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t.Run("with options", func(t *testing.T) { |
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t.Parallel() |
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roundTripper := New( |
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WithName("name"), |
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WithParent(http.DefaultTransport), |
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WithMeter(noop.NewMeterProvider().Meter("http.client")), |
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WithAttributes([]attribute.KeyValue{semconv.ServiceNameKey.String("service")}...), |
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) |
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assert.NotNil(t, roundTripper) |
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}) |
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} |
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func TestOtelRoundTripper_RoundTrip(t *testing.T) { |
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// Setup |
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t.Parallel() |
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server := makeTestServer(http.StatusOK, http.StatusText(http.StatusOK), 0) |
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// Arrange |
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client := &http.Client{ |
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Transport: New(), |
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} |
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// Act |
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response, err := client.Get(server.URL) |
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// Assert |
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assert.Nil(t, err) |
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defer func() { _ = response.Body.Close() }() |
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body, err := io.ReadAll(response.Body) |
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assert.Nil(t, err) |
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assert.Equal(t, http.StatusText(http.StatusOK), string(body)) |
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// Teardown |
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server.Close() |
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} |
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func TestOtelRoundTripper_RoundTripWithTimeout(t *testing.T) { |
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// Setup |
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t.Parallel() |
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server := makeTestServer(http.StatusOK, http.StatusText(http.StatusOK), 100) |
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// Arrange |
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client := &http.Client{ |
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Transport: New(), |
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Timeout: 10, |
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} |
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// Act |
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_, err := client.Get(server.URL) //nolint:bodyclose |
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// Assert |
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assert.NotNil(t, err) |
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var timeoutError net.Error |
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assert.True(t, errors.As(err, &timeoutError) && timeoutError.Timeout()) |
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// Teardown |
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server.Close() |
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} |
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func TestOtelRoundTripper_RoundTripWithCancelledContext(t *testing.T) { |
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// Setup |
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t.Parallel() |
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server := makeTestServer(http.StatusOK, http.StatusText(http.StatusOK), 0) |
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// Arrange |
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client := &http.Client{ |
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Transport: New(), |
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} |
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ctx, cancelFunc := context.WithCancel(context.Background()) |
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cancelFunc() |
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// Act |
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request, err := http.NewRequestWithContext(ctx, http.MethodGet, server.URL, nil) |
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assert.Nil(t, err) |
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_, err = client.Do(request) //nolint:bodyclose |
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// Assert |
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assert.NotNil(t, err) |
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assert.True(t, strings.HasSuffix(err.Error(), context.Canceled.Error())) |
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// Teardown |
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server.Close() |
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} |
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// makeTestServer creates an api server for testing |
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func makeTestServer(responseCode int, body string, delay int) *httptest.Server { |
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return httptest.NewServer(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) { |
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res.WriteHeader(responseCode) |
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if delay > 0 { |
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time.Sleep(time.Duration(delay) * time.Millisecond) |
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} |
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_, err := res.Write([]byte(body)) |
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if err != nil { |
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panic(err) |
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} |
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})) |
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} |
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NdoleStudio /
go-otelroundtripper
